IDEAL IMAX XTRA E320 - Page 54

FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING
54
IMAX XTRA - Installation & Servicing
Code Description Action
08 Air Pressure Switch did not close Check motorised damper operating
Check air damper is opening
Check ue for blockage
Check/clean burner
Check Air Pressure Switch sensing pipes
condition
Check fan speed
Check air Pressure Switch & replace if
necessary
18 Flow temperature too high Check no air in system or boiler
Check adequate ow of water through boiler
19 Return temperature too high Check no air in system or boiler
Check adequate ow of water through boiler
24 Return temperature > Flow temperature for excessive time Check no air in system or boiler
Check adequate ow of water through boiler
25 Flow temperature rise too fast Check no air in system or boiler
Check adequate ow of water through boiler
28 No tacho signal from fan Check wiring to fan
If wiring OK replace fan
29 Incorrect tacho signal from fan Check wiring to fan. If wiring OK replace fan.
30 Flow/return temperature differential too high Check no air in system or boiler
Check adequate ow of water through boiler
33 Tank sensor short circuit Not tted check parameter 46 settings
35 Flue thermistor short circuit Check wiring
Disconnect terminals from thermistor &
conrm short circuit using meter
Replace thermistor
38 Tank sensor open circuit Not tted check parameter 46 settings
40 Flue thermistor open circuit Check wiring
Disconnect terminals from
thermistor & conrm open circuit using meter
Replace thermistor
43 Parameter values in EEPROM values out of range Replace control module.
52 Flue gas temperature too high Check no air in system or boiler
Check adequate ow of water through boiler
65 Fanspeed during start not within the dead band Check wiring to fan. If wiring OK replace fan.
109 Heat exchanger temperature too high Check no air in system or boiler
Check adequate ow of water through boiler
116 Mains frequency deviation > 1.5Hz or processor oscillator error If mains supply frequency OK replace control module.
118 Flame current lost during burner on Check wiring
Check condition of ignition/detection
electrode & replace if necessary
MASTER AND SLAVE BOILER CONTROL MODULE BLOCKING CODES
71 TECHNICAL CHARACTERISTICS - TEMPERATURE SENSORS
The table below gives the relationship between temperature and resistance for the following sensors; ow thermistor, return
thermistor, ue thermistor, heat exchanger thermistor, outside temperature sensor and DHW tank sensor.
Temperature in
o
C Resistance in ohm Temperature in
o
C Resistance in ohm
10 22,800 60 32,250
20 14,700 70 2,340
30 9,800 80 1,710
40 6,650 90 1,260
50 4,610 100 950